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V = 15 m³
d = 900 kg/m³ - gęstość lodu
szukane:
m = ?
d = m/V |*V
m = d * V
m = 900kg/m³ * 15m³
m = 13 500 kg = 13,5 t
Odp. Kra lodowa ma masę 13 500 kg (13,5 t).